The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/dtrace_bsd.h

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    1 /*-
    2  * Copyright (c) 2007-2008 John Birrell (jb@freebsd.org)
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  *
   28  * This file contains BSD shims for Sun's DTrace code.
   29  */
   30 
   31 #ifndef _SYS_DTRACE_BSD_H
   32 #define _SYS_DTRACE_BSD_H
   33 
   34 /* Forward definitions: */
   35 struct mbuf;
   36 struct trapframe;
   37 struct thread;
   38 struct vattr;
   39 struct vnode;
   40 
   41 int dtrace_trap(struct trapframe *, u_int);
   42 
   43 /*
   44  * The dtrace module handles traps that occur during a DTrace probe.
   45  * This type definition is used in the trap handler to provide a
   46  * hook for the dtrace module to register its handler with.
   47  */
   48 typedef int (*dtrace_trap_func_t)(struct trapframe *, u_int);
   49 extern dtrace_trap_func_t       dtrace_trap_func;
   50 
   51 /*
   52  * A hook which removes active FBT probes before executing the double fault
   53  * handler. We want to ensure that DTrace doesn't trigger another trap, which
   54  * would result in a reset.
   55  */
   56 typedef void (*dtrace_doubletrap_func_t)(void);
   57 extern  dtrace_doubletrap_func_t        dtrace_doubletrap_func;
   58 
   59 /* Pid provider hooks */
   60 typedef int (*dtrace_pid_probe_ptr_t)(struct trapframe *);
   61 extern  dtrace_pid_probe_ptr_t  dtrace_pid_probe_ptr;
   62 typedef int (*dtrace_return_probe_ptr_t)(struct trapframe *);
   63 extern  dtrace_return_probe_ptr_t       dtrace_return_probe_ptr;
   64 
   65 /* Virtual time hook function type. */
   66 typedef void (*dtrace_vtime_switch_func_t)(struct thread *);
   67 
   68 extern int                      dtrace_vtime_active;
   69 extern dtrace_vtime_switch_func_t       dtrace_vtime_switch_func;
   70 
   71 /* The fasttrap module hooks into the fork, exit and exit. */
   72 typedef void (*dtrace_fork_func_t)(struct proc *, struct proc *);
   73 typedef void (*dtrace_execexit_func_t)(struct proc *);
   74 
   75 /* Global variable in kern_fork.c */
   76 extern dtrace_fork_func_t       dtrace_fasttrap_fork;
   77 
   78 /* Global variable in kern_exec.c */
   79 extern dtrace_execexit_func_t   dtrace_fasttrap_exec;
   80 
   81 /* Global variable in kern_exit.c */
   82 extern dtrace_execexit_func_t   dtrace_fasttrap_exit;
   83 
   84 /* The dtmalloc provider hooks into malloc. */
   85 typedef void (*dtrace_malloc_probe_func_t)(u_int32_t, uintptr_t arg0,
   86     uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
   87 
   88 extern dtrace_malloc_probe_func_t   dtrace_malloc_probe;
   89 
   90 /* dtnfsclient NFSv[34] access cache provider hooks. */
   91 typedef void (*dtrace_nfsclient_accesscache_flush_probe_func_t)(uint32_t,
   92     struct vnode *);
   93 extern dtrace_nfsclient_accesscache_flush_probe_func_t
   94     dtrace_nfsclient_accesscache_flush_done_probe;
   95 extern dtrace_nfsclient_accesscache_flush_probe_func_t
   96     dtrace_nfscl_accesscache_flush_done_probe;
   97 
   98 typedef void (*dtrace_nfsclient_accesscache_get_probe_func_t)(uint32_t,
   99     struct vnode *, uid_t, uint32_t);
  100 extern dtrace_nfsclient_accesscache_get_probe_func_t
  101     dtrace_nfsclient_accesscache_get_hit_probe,
  102     dtrace_nfsclient_accesscache_get_miss_probe;
  103 extern dtrace_nfsclient_accesscache_get_probe_func_t
  104     dtrace_nfscl_accesscache_get_hit_probe,
  105     dtrace_nfscl_accesscache_get_miss_probe;
  106 
  107 typedef void (*dtrace_nfsclient_accesscache_load_probe_func_t)(uint32_t,
  108     struct vnode *, uid_t, uint32_t, int);
  109 extern dtrace_nfsclient_accesscache_load_probe_func_t
  110     dtrace_nfsclient_accesscache_load_done_probe;
  111 extern dtrace_nfsclient_accesscache_load_probe_func_t
  112     dtrace_nfscl_accesscache_load_done_probe;
  113 
  114 /* dtnfsclient NFSv[234] attribute cache provider hooks. */
  115 typedef void (*dtrace_nfsclient_attrcache_flush_probe_func_t)(uint32_t,
  116     struct vnode *);
  117 extern dtrace_nfsclient_attrcache_flush_probe_func_t
  118     dtrace_nfsclient_attrcache_flush_done_probe;
  119 extern dtrace_nfsclient_attrcache_flush_probe_func_t
  120     dtrace_nfscl_attrcache_flush_done_probe;
  121 
  122 typedef void (*dtrace_nfsclient_attrcache_get_hit_probe_func_t)(uint32_t,
  123     struct vnode *, struct vattr *);
  124 extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
  125     dtrace_nfsclient_attrcache_get_hit_probe;
  126 extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
  127     dtrace_nfscl_attrcache_get_hit_probe;
  128 
  129 typedef void (*dtrace_nfsclient_attrcache_get_miss_probe_func_t)(uint32_t,
  130     struct vnode *);
  131 extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
  132     dtrace_nfsclient_attrcache_get_miss_probe;
  133 extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
  134     dtrace_nfscl_attrcache_get_miss_probe;
  135 
  136 typedef void (*dtrace_nfsclient_attrcache_load_probe_func_t)(uint32_t,
  137     struct vnode *, struct vattr *, int);
  138 extern dtrace_nfsclient_attrcache_load_probe_func_t
  139     dtrace_nfsclient_attrcache_load_done_probe;
  140 extern dtrace_nfsclient_attrcache_load_probe_func_t
  141     dtrace_nfscl_attrcache_load_done_probe;
  142 
  143 /* dtnfsclient NFSv[234] RPC provider hooks. */
  144 typedef void (*dtrace_nfsclient_nfs23_start_probe_func_t)(uint32_t,
  145     struct vnode *, struct mbuf *, struct ucred *, int);
  146 extern dtrace_nfsclient_nfs23_start_probe_func_t
  147     dtrace_nfsclient_nfs23_start_probe;
  148 extern dtrace_nfsclient_nfs23_start_probe_func_t
  149     dtrace_nfscl_nfs234_start_probe;
  150 
  151 typedef void (*dtrace_nfsclient_nfs23_done_probe_func_t)(uint32_t,
  152     struct vnode *, struct mbuf *, struct ucred *, int, int);
  153 extern dtrace_nfsclient_nfs23_done_probe_func_t
  154     dtrace_nfsclient_nfs23_done_probe;
  155 extern dtrace_nfsclient_nfs23_done_probe_func_t
  156     dtrace_nfscl_nfs234_done_probe;
  157 
  158 /*
  159  * Functions which allow the dtrace module to check that the kernel 
  160  * hooks have been compiled with sufficient space for it's private
  161  * structures.
  162  */
  163 size_t  kdtrace_proc_size(void);
  164 size_t  kdtrace_thread_size(void);
  165 
  166 /*
  167  * OpenSolaris compatible time functions returning nanoseconds.
  168  * On OpenSolaris these return hrtime_t which we define as uint64_t.
  169  */
  170 uint64_t        dtrace_gethrtime(void);
  171 uint64_t        dtrace_gethrestime(void);
  172 
  173 #endif /* _SYS_DTRACE_BSD_H */

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